<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%
	 if(session.getAttribute("username")==null)
	 {
	 	out.println("<SCRIPT LANGUAGE='JavaScript'>alert('您还没有登陆，请登陆!');location.href='login.html';</SCRIPT>");
	 }
	 

%>
